In the presentation here on slide 27:
we can see code in, I guess, TGTextEdit widget with syntax higlighting for C++.
How this effect can be achieved? I’m using ROOT 6.16.
Sorry, but this has never been implemented…
As a workaround, syntax highlighting can be achieved with e.g. geany c++ - Setting up CERN ROOT with an IDE - Stack Overflow or sublime.
An IDE is though more interesting: Coding in ROOT with the horsepower of an F1 - ROOT